PHP FTP/SFTP开关类

好的，那么通过ftp或sftp从您自己的服务器访问其他服务器。。。我写了一个小类来处理这两个问题。。它显然是新的，可以很容易地改进，所以我想我会把它扔到这里，看看其他人怎么想（stackoverflow得到了很多观点，希望这能帮助其他人），以及他们如何改进它。。。所以我想问题是。。。如何改进这一点

class ftp_sftp{
//determine, if ssh, to use phpseclib or php's inbuilt ssh_sftp 'libssh'
public $ssh_type = 'phpseclib';
//set ths path to the directory containing the entire phpseclib files
public $phpseclib_path = 'scripts/phpseclib0.3.0';

//private vars generated by this class
public $host;
public $username;
public $password;
public $connection_type;
public $port_number;
public $connection = false;

//contruct method which will attempt to set the connection details and automatically attempt to establisha connection to the server
public function __construct( $host, $username, $password, $connection_type, $port_number = false ){

    //add the webroot to the beginning of the $this->phpseclib_path (this is bespoke to my own configuration)
    $this->phpseclib_path = WEBROOT_PRIVATE.$this->phpseclib_path;

    //setting the classes vars
    $this->host         = $host;
    $this->username     = $username;
    $this->password     = $password;
    $this->connection_type = $connection_type;

    //set the port number to defaults based on connection type if none passed
    if( $port_number === false ){
        if( $connection_type == 'ftp' ){
            $port_number = 21;
        } else {
            $port_number = 22;
        }
    }
    $this->port_number = $port_number;

    //now set the server connection into this classes connection var
    $this->connection = $this->connect();
}

//tests the details passed and tries to establish a connection, returns false on fail.
function connect(){
    br($this->connection_type);
    switch( $this->connection_type )
        {
            case 'ftp':
                        $connection = ftp_connect($this->host);
                        $login = ftp_login($connection, $this->username, $this->password);

                        //if no connection was possible return false and leave $this-connection as false
                        if(!$connection || !$login){
                            return false;
                        } else {
                            // enabling passive mode
                            ftp_pasv( $connection, true );
                            return $connection;
                        }
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    //inlcude the phpseclib path in the include array and include the ssh2 class
                                    set_include_path($this->phpseclib_path );
                                    if(!include('Net/SSH2.php')){
                                        echo 'Sorry failed to load SSH2 class';
                                        br();
                                    }
                                    if(!include('Net/SFTP.php')){
                                        echo 'Sorry failed to load SFTP class';
                                        br();
                                    }

                                    $connection = new Net_SFTP($this->host, $this->port_number);
                                    $login = $connection->login($this->username, $this->password);
                            break;

                            case 'libssh2':
                                    $connection = ssh2_connect($this->host, $this->port_number);
                                    $login = ssh2_auth_password($connection, 'username', 'secret');
                            break;

                            default:
                                    echo 'No ssh method defined, please define one in: $ftp_sftp->ssh_type';
                                    exit();
                            break;
                        }


                        //if no connection was possible return false and leave $this-connection as false
                        if (!$connection || !$login) {
                            return false;
                        } else {
                            return $connection;
                        }
            break;

            default: echo 'No connection type set cannot choose a method to connect';
            break;
        }
}

//acces the phpseclib errors
public function errors(){
if($this->connection_type == 'sftp' && $this->ssh_type == 'phpseclib'){
        print_r($this->connection->getErrors());
    } else {
        echo 'no error logs available';
    }
}

//function used by this class to check certain values are set
public function connection_check(){
    if( $this->connection === false){
        echo 'Sorry there seems to be a connection problem please try again';
        br();
    }

    if( $this->connection_type === false){
        echo 'Sorry there seems to be a no connection type set';
    }

    if( $this->connection === false || $this->connection_type === false ){
        exit();
    }
}

//transfers a file to the connected server
public function put($targetLocationToSendTo, $existingLocationToSendFrom){

    //check the connection
    $this->connection_check();

    switch( $this->connection_type )
        {
            case 'ftp':
                        //ftp_put the file across
                        $put = ftp_put( $this->connection, $targetLocationToSendTo, $existingLocationToSendFrom, FTP_BINARY);
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $put = $this->connection->put( $targetLocationToSendTo, $existingLocationToSendFrom, NET_SFTP_LOCAL_FILE );
                            break;

                            case 'libssh2':
                                    $put = ssh2_scp_send($this->connection, $targetLocationToSendTo, $existingLocationToSendFrom, 0755);
                            break;
                        }
            break;
        }

    return $put;
}

//list the contents of a remote directory
public function dir_list( $dirToList ){

    //check the connection
    $this->connection_check();

    //run appropriate list
    switch( $this->connection_type )
        {
            case 'ftp':
                        $list = $this->connection = ftp_nlist($this->connection, $dirToList);
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $list = $this->connection->nlist( $dirToList );
                            break;

                            case 'libssh2':
                                    echo 'Sorry there is no support for nlist with libssh2, however this link has a possible answer: http://randomdrake.com/2012/02/08/listing-and-downloading-files-over-sftp-with-php-and-ssh2/';
                            break;
                        }
            break;
        }

    return $list;
}

//get the timestamp of the file on another server
public function remote_filemtime( $pathToFile ){

    //check the connection
    $this->connection_check();

    //run appropriate list
    switch( $this->connection_type )
        {
            case 'ftp':
                        $timeStamp = ftp_mdtm($this->connection, $pathToFile);
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $statinfo = $this->connection->stat( $pathToFile );
                            break;

                            case 'libssh2':
                                    $statinfo = ssh2_sftp_stat($this->connection, $pathToFile);
                            break;
                        }

                        if($statinfo['mtime']){
                            $timeStamp = $statinfo['mtime'];
                        } else {
                            $timeStamp = false;
                        }
            break;
        }

    return $timeStamp;
}

//make a directory on the remote server
public function make_dir( $dirToMake ){
    //check the connection
    $this->connection_check();

    //run appropriate list
    switch( $this->connection_type )
        {
            case 'ftp':
                        $dir_made = ftp_mkdir($this->connection, $dirToMake);
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $statinfo = $this->connection->mkdir( $dirToMake );
                            break;

                            case 'libssh2':
                                    $statinfo = ssh2_sftp_mkdir($this->connection, $dirToMake, 0755);
                            break;
                        }
            break;
        }

    return $dir_made;
}

//change directory
public function change_dir( $dirToMoveTo ){
    //check the connection
    $this->connection_check();

    //run appropriate list
    switch( $this->connection_type )
        {
            case 'ftp': $chdir = ftp_chdir($this->connection, $dirToMoveTo );
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $chdir = $this->connection->chdir( $dirToMoveTo );
                            break;

                            case 'libssh2':
                                    echo 'Sorry this feature does exist yet for when using libssh2 with the ftp_sftp class';
                                    exit();
                            break;
                        }
            break;
        }

    return $chdir;
}

//curent directory we are looking in
public function pwd(){

    //check the connection
    $this->connection_check();

    //run appropriate list
    switch( $this->connection_type )
        {
            case 'ftp': $pwd = ftp_pwd($this->connection);
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $pwd = $this->connection->pwd();
                            break;

                            case 'libssh2':
                                    echo 'Sorry this feature does exist yet for when using libssh2';
                                    exit();
                            break;
                        }
            break;
        }

    return $pwd;
}

//delete file
public function delete_file($fileToDelete){
    //check the connection
    $this->connection_check();

    //run appropriate list
    switch( $this->connection_type )
        {
            case 'ftp': $unlink = ftp_delete($this->connection, $fileToDelete);
            break;

            case 'sftp':
                        //decide which ssh type to use
                        switch( $this->ssh_type ){
                            case 'phpseclib':
                                    $unlink = $this->connection->delete( $fileToDelete );
                            break;

                            case 'libssh2':
                                    $unlink = ssh2_sftp_unlink($this->connection, $fileToDelete);
                            break;
                        }
            break;
        }

    return $unlink;
}   }//end of class

使用类：

$ftp_sftp = new ftp_sftp( '92.21.627.163', 'ftpuser', 'yourpassword', '', 'ftp', '21' );
echo $ftp_sftp->pwd();

我在使用EasyHP将phpseclib连接到我的win7机器上时遇到了一点问题，并启动了一个Q。。如果有人有任何想法，我将非常感激。。。

---

Wordpress的SFTP实现以一种奇怪的方式执行chdir和pwd。它们执行ssh2\u exec（）。不知道这是否适用于那里的文件下载/上传。以下是它们的实现：

我认为phpseclib更好，但仅供参考

另外，phpseclib的最新版本是0.3.1。idk。。。仅供参考，哈哈

最后，可能确实包含_once（）而不是include（）？这样可以多次实例化该类？

此代码的主要问题是它可以垂直扩展。假设您决定添加另一个实现，一个本地文件系统，为'file'的

$connection\u type

引入第三个潜在值。现在你必须通过代码添加

case'file'：

到处都是的条件，使得

ftp\u sftp

失控。现在，在代码的“sftp”分支中，您又遇到了同样的问题，处理

$ssh\u type

原始代码

switch($connection_type) {
    case 'ftp'  : // ...
    case 'stfp' : // ...
}

变为

switch($connection_type) {
    case 'ftp'  : // ...
    case 'stfp' : // ...
    case 'file' : // ...
}

请记住，这适用于打开

$connection\u type

的代码中的每个开关语句。想象一下，我们将向

ftp\u sftp

类添加多少行代码来合并每个附加行为

事实上，看起来您现在实际上有3种策略，ftp、sftp和ssh

这里要做的是将代码设置为水平扩展，而不是垂直扩展，方法是通过

基本上，您所做的是在代码中提取公共接口，然后为FTP和SFTP创建单独的实现。有很多不同的方法来进行实际的实施，所以调整到你的心的内容

通用接口

switch($connection_type) {
    case 'ftp'  : // ...
    case 'stfp' : // ...
}

这是任何“ftp类”必须能够完成的定义

interface PhpFtp
{
    public function __construct($host, $username, $password, $port_number = false);
    public function connect();
    public function errors();
    public function connection_check();
    public function put($targetLocationToSendTo, $existingLocationToSendFrom);
    public function dir_list( $dirToList );
    public function remote_filemtime( $pathToFile );
    public function make_dir( $dirToMake );
    public function change_dir( $dirToMoveTo );
    public function pwd();
    public function delete_file($fileToDelete);
}

工厂

现在，代码中只有一条switch语句用于检查

$connection\u type

。您可能会决定以不同的方式处理

默认情况

class PhpFtpFactory
{
    public static function create($connection_type)
    {
        switch($connection_type) {
            case 'ftp':
                $oFtp = new Ftp();
                break;
            case 'sftp':
                $oFtp = new Sftp();
                break;
            default:
                throw new UnexpectedValueExcpetion(
                    'No connection type set cannot choose a method to connect');
        }

        // Potential follow-up construction steps
        return $oFtp;
    }
}

基类

switch($connection_type) {
    case 'ftp'  : // ...
    case 'stfp' : // ...
    case 'file' : // ...
}

这不是绝对必要的，但很有帮助。另外，我们在这里潜入另一种设计模式，叫做
BaseFtp:：pwd
是一种模板方法，它控制整个pwd算法，但将其一部分委托给具体的子对象

abstract class BaseFtp implements PhpFtp
{
    public function pwd()
    {
        $this->connection_check();
        return $this->_pwd();
    }

    abstract protected function _pwd();
}

具体的FTP实施

现在我们有了一个简洁的FTP类，它只执行FTP操作，它对SFTP一无所知

class Ftp extends BaseFtp
{
    protected function _pwd()
    {
        return ftp_pwd($this->connection);
    }

    public function connect()
    {
        $connection = ftp_connect($this->host);
        $login      = ftp_login($connection, $this->username, $this->password);

        // if no connection was possible return false and leave $this-connection as false
        if(!$connection || !$login)
            return false;

        // enabling passive mode
        ftp_pasv( $connection, true );
        return $connection;
    }
}

混凝土SFTP等级

switch($connection_type) {
    case 'ftp'  : // ...
    case 'stfp' : // ...
    case 'file' : // ...
}

现在我们有了一个独立的SFTP类，但是请注意它会打开
$ssh\u type
，就像原来的
ftp\u SFTP
类对
$connection\u type
所做的那样。一旦你掌握了策略模式，并且完成了
Ftp
&
Sftp
类，你就可以回到
Sftp
实现中实现策略模式，例如，你有两个类
Phpseclib
&
Libssh2

class Sftp extends BaseFtp
{
    protected function _pwd()
    {
        // decide which ssh type to use
        switch($this->ssh_type) {
            case 'phpseclib':
                return $this->connection->pwd();

            case 'libssh2':
                echo 'Sorry this feature does exist yet for when using libssh2';
                return false;
        }
    }

    public function connect()
    {
        // decide which ssh type to use
        switch( $this->ssh_type ) {
            case 'phpseclib':
                // inlcude the phpseclib path in the include array
                // and include the ssh2 class
                set_include_path($this->phpseclib_path );
                if(!include('Net/SSH2.php')){
                    echo 'Sorry failed to load SSH2 class';
                    br();
                }
                if(!include('Net/SFTP.php')){
                    echo 'Sorry failed to load SFTP class';
                    br();
                }

                $connection = new Net_SFTP($this->host, $this->port_number);
                $login = $connection->login($this->username, $this->password);
                break;

            case 'libssh2':
                $connection = ssh2_connect($this->host, $this->port_number);
                $login = ssh2_auth_password($connection, 'username', 'secret');
                break;

            default:
                echo 'No ssh method defined, please define one in: $ftp_sftp->ssh_type';
                exit();
                break;
        }

        if(!$connection || !$login)
            return false;
    }
}

使用新代码

switch($connection_type) {
    case 'ftp'  : // ...
    case 'stfp' : // ...
}

随着新系统的就位，更容易看到什么是什么，每个类都专注于它的特定领域，代码水平增长。这是什么意思？还记得上文吗，当我们考虑在原始范例中添加第三个
$connection\u type
'file'时？在新安排中，我们更新了一条开关语句，即工厂中的语句：

class PhpFtpFactory
{
    public static function create($connection_type)
    {
        switch($connection_type) {
            case 'ftp':
                $oFtp = new Ftp();
                break;
            case 'sftp':
                $oFtp = new Sftp();
                break;
            case 'file':
                $oFtp = new File();
                break;
            default:
                throw new UnexpectedValueExcpetion(
                    'No connection type set cannot choose a method to connect');
        }

        // Potential follow-up construction steps
        return $oFtp;
    }
}

然后当然要添加新的具体实现

class File extends PhpFtp
{
    // ...
}

由于新的
文件
类可以放在它自己的空间中，因此我们没有扩展一个中心类，即原始的
ftp\u sftp
类

为了使用新的系统，您向工厂查询一个实例，然后从那里开始

// get an instance of the Ftp class
$ftp  = PhpFtpFactory::create('ftp');

// get an instance of the Sftp class 
$sftp = PhpFtpFactory::create('sftp');

这两个实例都支持所有
PhpFtp
函数，因为它们实现了接口！这也使您能够编写多态代码。考虑类型对接口
的提示函数
// This is polymorphic code
function doFtpStuff(PhpFtp $oFtp) {
   // As mentioned above $oFtp can be an instance of any class that implements PhpFtp
   $oFtp->connect();
   $oFtp->pwd();
}

我建议继承减少那些switch语句。你能详细说明一下吗？我已经尽了全力寻找答案，因为这在野外是一个非常普遍的问题。希望这是有道理的。如果你掌握了最简单的设计模式——策略模式，我向你保证，你会立即绕过你周围75%的开发人员！如果你迷上了图案，拿起标准包，你就会成为一个忍者。不过，仅供参考，听起来你在问两个问题，1。如何改进代码，2。为什么会出现win7/EasyHP问题。我回答了1。，听起来好像@neubert回答了2。哇。非常感谢你在那里的帮助。我要到星期五才能实施这个计划，但我会告诉你我的进展情况